I'm trying to get my hands on a Hella 5292 - Hella don't make them any more, so I'm looking for something sitting on a shelf somewhere, or that someone is happy to sell used.
I really like what Glenn XB-60 did for his third brake light on this page! AP2289 Build log 'stage 2' It has that great period look, like someone added it in the late 70s early 80s!